body {
    padding: 15px;
    background-color: #f2f3f5;
}
.row1 {
    overflow: hidden;
}
.prevent-l {
    float: left;
    width: 350px;
    height: 350px;
}
.prevent-l img {
    width: 100%;
    height: 100%;
}
.row2 {
    margin: 25px auto 15px;
}
.prevent-r {
    float: left;
    text-align: center;
    margin-left: 30px;
}
.prevent-100 {
    width: 100px;
    height: 100px;
    background-color: skyblue;
    border-radius: 50px;
    overflow: hidden;
}
.prevent-50 {
    width: 50px;
    height: 50px;
    background-color: skyblue;
    border-radius: 50px;
    margin-left: 24px;
    margin-top: 20px;
    overflow: hidden;
}
.row2 {
    text-align: center;
}